在课堂上，他常常发呆。
zài kètáng shàng ， tā chángcháng fādāi 。
In class, he often daydreams.
她在窗前发呆，似乎在想什么。
tāzài chuāng qián fādāi ， sìhū zài xiǎng shénme 。
She is daydreaming by the window, as if she is thinking about something.
我在公园里发呆，享受着宁静的时光。
wǒzài gōngyuán lǐ fādāi ， xiǎngshòu zháo níngjìng de shíguāng 。
I daydream in the park, enjoying the peaceful time.